var my_imgs = new Array();
var my_imgs_link = new Array();
var my_imgs_alt = new Array();

/* Set image URLs */
my_imgs[0] = "images/wcr_banner_best_bet.gif";
my_imgs[1] = "images/wcr_banner_sunday_special.gif";
my_imgs[2] = "images/wcr_banner_top_four.gif";

/* Set image link URLs */
my_imgs_link[0] = "the_best_bet.html";
my_imgs_link[1] = "sunday_special.html";
my_imgs_link[2] = "saturdays_top_four.html";

/* Set image alternate text */
my_imgs_alt[0] = "The Best Bet - The best bet of the day - click here";
my_imgs_alt[1] = "Sunday Special - Sunday's top four tips at a discounted rate - click here";
my_imgs_alt[2] = "Saturdays Top Four - Top 4 picks in each race at Sydney & Melbourne - click here";

if (document.getElementById && document.createTextNode) {
 
  var the_div = document.getElementById("my_banners");
  var ran_num = Math.floor(Math.random()*(my_imgs.length));
  
  var the_HTML = "<a href=\""+my_imgs_link[ran_num]+"\">";
  the_HTML += "<img src=\""+my_imgs[ran_num]+"\" class=\"banner_imgs\" ";
  the_HTML += "alt=\""+my_imgs_alt[ran_num]+"\" /></a>";
  the_div.innerHTML = the_HTML;
  
}